SIGMATEK 074.00660, Power Installation Manual

Page: 70 / 98

70
Sigmatek FDD Sizes 7 to 9 Power Installation Guide
Figure 4-14 and Figure 4-15 illustrate the preferred construction of cable and the method of
clamping. The outer sheath of the cable should be stripped back enough to allow the clamp to be
installed. The shield must not be broken or opened at this point. The clamps should be installed close
to the drive or feedback device, with the ground connections made to a ground plate or similar
metallic ground surface.
Figure 4-14 Feedback cable, twisted pair
Figure 4-15 Feedback cable connections
To ensure suppression of radio frequency emission, observe the following:
• Use a cable with an overall shield
• Clamp the overall shield to grounded metallic surfaces at both the
encoder and the drive, as illustrated in section 4-15
Twisted
pair
cable
Twisted pair shield
Cable
Cable overall shield
Cable
Cable
shield
Twisted
pair
shield
Cable
shield
Twisted
pair
shield
Connection
at motor
Connection
at drive
Ground clamp
on shield
Shield
connection
to 0V
Shield
connection
to 0V